Orbital Contact Analyzer

Single-file HTML • J2 Dynamics • Spherical Ground Model • Good for Demos

Simulation Controls

Ground Station

Satellite 1 (blue)

Satellite 2 (orange)

Equirectangular map (no external tiles). Tracks for full duration; marker and FOV at current time.
Projection • Index 0 / 0 • Time
Sat 1 Track/Horizon Sat 1 FOV/GS Link Sat 2 Track/Horizon Sat 2 FOV/GS Link LOS Link Sat 1 Marker Sat 2 Marker Ground Station

Line‑of‑Sight Intervals

Computed between satellites across the whole time span.
Start (UTC)End (UTC)Duration (s)

Ground Station Access Intervals

Computed for each visible satellite across the whole time span.
SatelliteStart (UTC)End (UTC)Duration (s)